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A block attached to an ideal spring of force constant (spring constant) 15 N/m executes simple...

A block attached to an ideal spring of force constant (spring constant) 15 N/m executes simple harmonic motion on a frictionless horizontal surface. At time t = 0 s, the block has a displacement of -0.90 m, a velocity of -0.80 m/s, and an acceleration of +2.9 m/s2 . The mass of the block is closest to? Please show all of your work step by step including formulas used and variables used.
A) 2.3 kg
B) 2.6 kg
C) 4.7 kg
D) 9.4 kg

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Answer #1

Concept: we use properties of simple harmonic motion to find the angular frequency first and then use that to find the mass as shown below

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